Ventilators



March 13, 1956 Filed Jan. 29, 1953 c. B. ROSENBERG 2,738,124

VENTILATORS 2 Sheets-Sheet l INVENTOR. CHAR LE5 B. ROSENBERG ATTORNEYMarch 13, 1956 c. B. ROSENBERG 2,733,124

VENTILATORS Filed Jan. 29, 1953 2 Sheets-Sheet 2 36 2 o Z4 24 O a P I W26/ I Z5 -22 g I l 1 /6 .35 Q 1 49 34 k :J 5.2 i 4-6" 1 N 52 INVENTOR.CHARLES S. ROSENBERG ATTORNEY 2 ,738,124 VENTILATORS' Charles:Rosenberg, Detroit,.Mich., as'signor to Tripari Products, Inca,

Michigan Application January 29 1953, Serial No. 334,043 -8 Claims; (CL2 30 114) RoyaIOakyMichQ a corporation of This invention relates to,ventilators and more particu larly, to ventilatorsof the evacuator'typelThe invention comprehendsa ventilator of the evacuatof type forcompartments an'd/or'buildingsb Theventilator' includes a cowl havingclosure plates and motor driven means for automatically raising theclosure plates dis-' pelling air and/or fumes from the compartment andlowering the closure plates when it is no longer desired to evacuate theair and/or fumes from the compartment.

An object of the invention is to provide a ventilator including a cowl,a motor driven fanfo'r' inducing movemerit of air "through the cowl,closure means for the cowl and means actuated by axial movement of the"fall" for control of thec'losure means.

Another object of the invention is to provide an evacuator ventilatorincluding a cowl, a rotatable and axially movable fan therein, a closurefor the cowl and means carried by the fan for control of the closure.

Another object of the invention is to provide a ventilator of theevacuator type wherein a driven shaft carries a fan movable axiallythereon and with the shaft during its maximum speed of rotation, and acam carried by the fan and cooperative with an arm carried by the shaftis effective to move the fan axially.

A further object of my invention is to provide a ventilator of theevacuator type which has high efficiency in operation, and yet markedsimplicity as a whole and in respect to each of its component parts sothat its manufacture may be economically facilitated both as regards tothe parts and their assembly.

With these and other objects in view which may be incident to myimprovements, the invention consists in the parts and combinations to behereafter set forth and claimed, with the understanding that the severalnecessary elements comprising my invention may be varied in constructionand arrangement, without departing from the spirit and scope of theappended claims.

In the drawings forming a part of this specification:

Figure l is a vertical sectional view illustrating the ventilator inclosed position.

Figure 2 is an enlarged detail view illustrating the sleeve carried bythe fan and having thereon a cam surface, and

Figure 3 is a vertical sectional view of the ventilator illustrated inthe open position.

Referring to the drawings for more specific details of the invention, 10indicates a cylindrical housing having spaced reinforcing flanges 12 and14 which also serve as supports and anchoring means for the housing. Adiametrical support 16 arranged within the housing is fixedly secured toplates 18 riveted or otherwise secured to the wall of the housing asindicated at 20. The support 16 is preferably a channel section with itsflanges. extended upwardly and cross members 22 welded or otherwisesecured to the flanges serve to support bearing blocks 24 which in turnsupport parallel rods 26 and 28 having mounted thereon correspondingcover plates 30 and 32 contoured to fit and close one end of thehousing.

Spaced corresponding bearings 34 and 36 mounted 2,738,124 Patented Mar.13, 1956 on the' supp0rt-16 and cross member 22 axially of the housingsupport for rotation a shaft 38. As shown, the shaft has on one endthereof a collar 40' fixedly secured to the shaft and the collarsupports a pin 42 normal to the shaft, and a coupling member 44 isfixedly secured to the other end of the shaft.

A- hub 46'mounted for rotation on the shaft 38 has secured thereto, asubstantial flange 48 reinforced by an annular plate 50. Equi-spaced fanblades 52 are fixedly secured to the flange 48 and a sleeve 54 fixedlysecured to and dependent from the annular plate 50 is cut away toprovide a cam surface 56 for cooperation with the pin 42 carried by theshaft 38.

A thrust bearing 58 mounted on the hub 46 carrying thefan has pivotallyconnected thereto corresponding arms 60 andw62 which, in turn arepivotally connected to;the corresponding cover plates and 32 so thatupon axial movement of the thrust bearing the cover plates may be raisedand/ or lowered.

A motor 64' suitably supported as indicated at 66 has its armature shaft68in axial alignment with the shaft 38, and acoupling member 70 fixedlysecured to the armature shaft cooperates with the coupling member 44to'etfectively couple the shaft 38 to the armature shaft and ahousing 72suitably supported on the bearing blocks a 24 serves to enclose themotor.

In operation upon energization of the motor 64, the

s aft 38 coupled to the armature shaft of the motor is set- Upon initialrotation of the shaft 38, the pin 42 carried thereby slides over the camsurface 56 on the sleeve 54. This results in elevation of the fan due toa differential in rotation of the shaft 38 and the fan. When the fan isfully elevated to the position where the pin 42 abuts the wall of thesleeve 54, the fan rotates with the shaft at its maximum speed ofrotation. As the fan is elevated, the hub thereof abuts the thrustmember 58 and slides the thrust member on the shaft and this movement ofthe thrust member is transmitted through the arms 60 and 62 to the coverplates 30 and 32 resulting in raising the cover plates and uncoveringthe cowl so that air and/or fumes may be evacuated through the cowl.

Upon cutting out the motor a differential in rotation between the shaftand the fan immediately occurs and due to the weight of the fan, itdescends under the force of gravity, and during this movement the pin onthe shaft slides on the cam surface to the top of the cam where the fanremains static, and during this movement of the fan, the lids 30 and 32gradually descend under the force of gravity to close the cowl, and asthe lids descend they transmit force through the arms to the thrustmember effective to slide the thrust member on the shaft insubstantially abutting relation to the hub of the fan.

While the invention has been described in connection with certainspecific embodiments, the principle involved is susceptible of numerousother applications that will readily occur to persons skilled in theart. The invention is, therefore, to be limited only as indicated by thescope of the appended claims.

Having thus described the invention, what I claim as new and desire tosecure by Letters Patent is:

1. A ventilator comprising a housing, a closure therefor, a drive shaftin the housing, a pin fixedly secured thereto and extended laterallytherefrom, a fan slidable on the shaft, a cam carried by the fan andcooperating with the pin to move the fan relative to the shaft and forlocking the fan to the shaft, and means actuated by movement of the cameffective to. raise and lower the closure.

2. A ventilator comprising a housing, a closure thereensues for, a driveshaft in the housing, a pin extended radially from the shaft, a fanslidable on and rotatable with the shaft, a cam depending from the fanand cooperating with the pin and effective to slide the fan on theshaft, and linkge connected between the fan and the closure effective toraise and lower the closure.

3. A ventilator comprising a housing, a closure therefor, a drive shaftin the housing, a pin carried by the shaft, a fan slidable on androtatable with the shaft, a member carried by the fan and cooperatingwith the pin for sliding the fan on the shaft and for locking the fan tothe shaft for rotation therewith, a thrust member slidable on the shaftfor cooperation with the fan and linkage connecting the thrust member tothe closure.

4. A ventilator comprising a housing, a closure therefor, a shaftrotatable in the housing, a pin carried by the shaft, a fan slidable onand rotatable with the shaft, a cam depending from the fan andcooperating with the pin for shifting the fan on the shaft and forlocking the fan to the shaft, a thrust member on the shaft cooperatingwith the fan and linkage connecting the thrust member to the closure.

5. A ventilator comprising a housing, closures therefor, a shaftrotatable in the housing, a pin extended radially from the shaft, a fanslidable on and rotatable with the shaft, a sleeve depended from thefan, a cam on the free end of the sleeve cooperating with the pin formoving the fan on the shaft and for locking the fan to the shaft andmeans connected between the fan and the closures effective to open andshut the closures.

6. A ventilator comprising a housing, cover plates therefor, a driveshaft in the housing, a pin extended radially 4 from the shaft, a hubslidable on the shaft and rotatable therewith, a fan on the hub, a camdepended from the fan cooperating with the pin on the shaft, a thrustblock slidable on the shaft in abutting relation to the hub, and armspivotally connecting the thrust block to the cover plates.

7. A ventilator comprising a housing, cover plates therefor, a shaftrotatable in the housing, a pin supported radially on the shaft, a fanslidable on the shaft and rotatable therewith, a cam depending from thefan, and cooperating with the pin for sliding the fan on the shaft andfor locking the fan to the shaft, and means connected between the fanand the cover plates for raising and lowering the plates.

8. A ventilator comprising a housing, cover plates therefor, a driveshaft in the housing, a pin supported on the shaft and extended radiallytherefrom, a fan on the shaft, a sleeve carried by the fan, a camsurface on the sleeve, cooperating with the pin on the shaft for raisingand lowering the fan and for locking the fan to the shaft, a thrustblock slidable on the shaft cooperating with the fan and arms pivotallyconnecting the thrust block to the cover plates for raising and loweringthe cover plates.

References Cited in the file of this patent UNITED STATES PATENTS1,425,903 Roth Aug. 15, 1922 1,529,711 Parrot et a1 Mar. 17, 19251,764,704 Teare June 17, 1930 2,489,446 Biancani Nov. 29, 1949

